waterfall
n.— «Lawmakers use the term “waterfall” to describe surplus revenue. Hube worried there might be no water in this year’s waterfall.» —“House acts on spending, tax rates and fees” by Nancy Remsen in Montpelier Burlington Free Press (Vermont) Feb. 19, 2007. (source: Double-Tongued Dictionary)
Further reading
A retronym is a word coined to distinguish something new from an older, more generic version, such as electric guitar or clock radio. A couple of new retronyms are fine water, or “unprocessed water that reflects a region’s terroir” and water...
A librarian opens a book and finds a mysterious invitation scribbled on the back of a business card. Another discovers a child’s letter to the Tooth Fairy, tucked into a book decades ago. What stories are left untold by these forgotten...